Event: Derby & District Division 3

Opponent Rating Result
Brian Lever 1536 ½ - ½
George Moorcroft 1351 1 - 0
Garry Sands 1542 1 - 0
Piotr Natoniewski 1477 ½ - ½
Nigel D Marshall 1428 ½ - ½
Edmund M. Jones 1691 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1571 = (9025 + 400 * (2 - 1)) / 6)

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